feat: add enum export to node sdk

Author: loks0n

templates/node/index.d.ts.twig

@@ -254,4 +254,13 @@ declare module "{{ language.params.npmPackage|caseDash }}" {
 {% endfor %}
   }
 {% endfor %}
+
+{% for enum in spec.enums %}
+export enum {{ enum.name | caseUcfirst  }} {
+{% for value in enum.enum %}
+{% set key = enum.keys is empty ? value : enum.keys[loop.index0] %}
+    {{ key | replace({'-': ''}) | caseEnumKey }} = '{{ value }}',
+{% endfor %}
+}
+{% endfor %}
 }